<template>
 
  <div class="app-container">
 
    <!--表单-->
 
    <el-form :inline="true" class="demo-form-inline">
 
 
      <el-form-item>
 
        <el-select v-model="searchObj.type" clearable placeholder="请选择">
 
          <el-option label="学员登录数统计" value="login_num"/>
 
          <el-option label="学员注册数统计" value="register_num"/>
 
          <el-option label="课程播放数统计" value="video_view_num"/>
 
          <el-option label="每日课程数统计" value="course_num"/>
 
        </el-select>
 
      </el-form-item>
 
 
      <el-form-item>
 
        <el-date-picker
 
          v-model="searchObj.begin"
 
          type="date"
 
          placeholder="选择开始日期"
 
          value-format="yyyy-MM-dd" />
 
      </el-form-item>
 
      <el-form-item>
 
        <el-date-picker
 
          v-model="searchObj.end"
 
          type="date"
 
          placeholder="选择截止日期"
 
          value-format="yyyy-MM-dd" />
 
      </el-form-item>
 
      <el-button
 
        :disabled="btnDisabled"
 
        type="primary"
 
        icon="el-icon-search"
 
        @click="showChart()">查询</el-button>
 
    </el-form>
 
 
    <div class="chart-container">
 
      <div id="chart" class="chart" style="height:500px;width:100%" />
 
    </div>
 
  </div>
 
</template>

<script>
 
import echarts from 'echarts'
 
 
import daily from '@/api/statistics/daily'
export default {
 
  data() {
 
    return {
 
      searchObj: {
 
        type: '',
 
        begin: '',
 
        end: ''
 
      },
 
      btnDisabled: false,
 
      chart: null,
 
      title: '',
 
      xData: [],
 
      yData: []
 
    }
 
  },
 
  methods: {
 
    showChart() {
 
      this.initChartData()
 
 
      // this.setChart()
 
    },
 
 
    // 准备图表数据
 
    initChartData() {
        daily.showChart(this.searchObj).then(response=>{
        // 数据
 
        this.yData = response.data.dataList
    
    
        // 横轴时间
    
        this.xData = response.data.dateList
      
    
        // 当前统计类别
    
        switch (this.searchObj.type) {
    
          case 'register_num':
    
            this.title = '学员注册数统计'
    
            break
    
          case 'login_num':
    
            this.title = '学员登录数统计'
    
            break
    
          case 'video_view_num':
    
            this.title = '课程播放数统计'
    
            break
    
          case 'course_num':
    
            this.title = '每日课程数统计'
    
            break
    
    }
 
    this.setChart()

        })
 
    },
 
 
    // 设置图标参数
 
    setChart() {
 
      // 基于准备好的dom，初始化echarts实例
 
      this.chart = echarts.init(document.getElementById('chart'))
 
      // console.log(this.chart)
 
 
      // 指定图表的配置项和数据
 
      var option = {
        
        title:{
          text: this.title
        },
         
        tooltip: {
        
            trigger: 'axis'
        
        },
        dataZoom: [{
        
          show: true,
        
          height: 30,
        
          xAxisIndex: [
            0
          ],
          bottom: 30,
          start: 10,
          end: 80,
          handleIcon: 'path://M306.1,413c0,2.2-1.8,4-4,4h-59.8c-2.2,0-4-1.8-4-4V200.8c0-2.2,1.8-4,4-4h59.8c2.2,0,4,1.8,4,4V413z',

          handleSize: '110%',
          handleStyle: {
            color: '#d3dee5'
          },
          textStyle: {
            color: '#fff'
          },
          borderColor: '#90979c'
        },
        {
          type: 'inside',
          show: true,
          height: 15,
          start: 1,
          end: 35
        }]   ,     
        // x轴是类目轴（离散数据）,必须通过data设置类目数据

        xAxis: {
 
          type: 'category',
 
          data: this.xData
 
        },
 
        // y轴是数据轴（连续数据）
 
        yAxis: {
 
          type: 'value'
 
        },
 
        // 系列列表。每个系列通过 type 决定自己的图表类型
 
        series: [{
 
          // 系列中的数据内容数组
 
          data: this.yData,
 
          // 折线图
 
          type: 'line'
 
        }]
 
      }
      this.chart.setOption(option)
    }
  }
}
  
</script>